1992-1999Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and
common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres
Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

hi guys i just bought a 1998 pontiac bonneville form a dealership last week and i cant get it to run right at all i have tuned it up i have changes the 02 sensor tps and maf its been gettin slighty better cause when i first got it it was horrible but i notice when its runnin and it can be runnintg quiet and its like the lights dim and it idles rough im thinkin it may be a ground or sumthin cause it cant be nuthin else